----- Original Message ----- From: "Eric Nelson" <emanmb@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx> Sent: Friday, April 27, 2007 8:58 AM Subject: [pure-silver] Re: Chemical subsitution
According to Ryuji Suzuki, Dr. Nishimura, and others, most commercially packaged Sodium Bisulfite is actually Sodium Metabisulfite. This was known to Kodak when they made up the formulas specifying the Bisulfite. Evidently, there is no difference once they are dissolved in water. I would buy whatever is available in the requisite purity at the lowest price.Thanks again. Back when I was at RIT, (when dinosours roamed the earth), I did a project where I mixed D-72 5 times, each mix missing a different one of the 5 components to demonstrate the effect of each when printing. Without sulfite the developer worked poorly and was dark brown showing the importance of it preservative aspects. So here's a follow up question. Does it matter which one I buy now? For formulas calling for bi or meta, is it "better" to have these exact compounds? Just wondering if I should stock them both. Eric --- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
--- Richard Knoppow Los Angeles, CA, USAdickburk@xxxxxxxxxxxxx
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